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Where has the process of nuclear fusion been occurring for over four billion years?

Nuclear fusion has been occurring in the core of the Sun for over four billion years. The intense heat and pressure at the Sun's core allow hydrogen atoms to fuse into helium, releasing a tremendous amount of energy in the process.


How long does a Brown Thrasher live?

An average, the Brown Thrasher lives four to five years however, there have been instances where wild Thrashers have lived as long as eight years.


Is life span of sun longer than we expected?

No. For decades it has been known that the sun will live another four to five billions years, that right now it is in the middle of its life span. There has been no change to this view since it was realized that the sun was billions of years old rather than thousands or millions.


What is a score in four score?

A score is 20 years. Four score is 80 years. Thank Abe Lincoln for bringing this wonderful term to us in a way that it keeps "hanging on" through generations that might have forgotten other old units of measure.


What is the four phases of gas exchange in humans?

The four phases of gas exchange in humans are ventilation, pulmonary diffusion, transport of gases in the blood, and systemic diffusion. Ventilation involves the movement of air in and out of the lungs. Pulmonary diffusion is the exchange of oxygen and carbon dioxide between the alveoli and the blood. Transport of gases involves the carriage of oxygen by hemoglobin and carbon dioxide by plasma. Systemic diffusion is the exchange of oxygen and carbon dioxide between the blood and body tissues.